Disorders of the Scalp and Hair

  • Marwa Abdallah
  • Constantin E. OrfanosEmail author


Human hair my show different shapes: The hair shaft may be straight in Asians or curly in Negroid populations, in contrast to the straight and wavy hair of Caucasians. The short curly hair of black-skinned individuals grows slower and has a larger diameter than in whites. The hair shaft is rather irregular, often elliptically flattened; trichonodosis and trichoptilosis are often seen; and pair grouping occurs. The terminal follicles are large, partly curved, with a golf club-shaped bulb. Nevertheless, there are broad variations in number, size, and shape of the hair and the hair follicles between the different ethnics, tribes, and families. Some racial groups have clearly sparse beard and axillary hair; some others are more hypertrichotic.


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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Dermatology and VenereologyAin Shams UniversityCairoEgypt
  2. 2.The Free University of Berlin, Medical School CharitéBerlinGermany

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